[H]Hitman: Sniper Challenge / Titan Quest (KEYS) [W]Batman: Arkham City / Batman: Arkham Asylum

is their anything else your prepared to trade for Batman: Arkham City?

I got a key for Hitman: Sniper Challenge from someone, it didn't activate properly on Steam, contacted support. This was their response: 'This subscription is no longer avialable for registration.'

So I kindly advice you to not trade it anymore.